Malicious PDF — malware analysis report

Static analysis result for SHA-256 730334ecaf1e58e4…

MALICIOUS

PDF

41.5 KB Created: 2020-04-02 09:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9ad2ccbf48b8c64281fd3ad5daf3c393 SHA-1: a8304abb4c87cfa86565453213d627099794f944 SHA-256: 730334ecaf1e58e4a90f77c7f7da97761c268ef0497940538635ceb5b4057cb3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to other PDF files hosted on SEO-optimized domains. This behavior is indicative of a link farm designed to obscure the true malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be intended to trick the user into downloading a password-protected archive, likely containing a secondary payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://rhymeswithneedle.com/uploads/1/3/0/5/130589305/130589305.html#ventajas+y+desventajas+del+uso+de+la+tecnologia+en+la+educacion+superior
    • http://mayahypnotherapy.com/uploads/1/3/0/7/130738825/5fdd20a7a.pdf
    • http://mysmartptt.com/uploads/1/3/0/7/130740573/2f969d92ef6e.pdf
    • http://thelyszyklibrary.com/uploads/1/3/0/4/130436037/b8a1b27546e.pdf
    • http://figgyandjiggydesigns.com/uploads/1/3/0/4/130488696/remuwe.pdf
    • http://viollettauccellineri.com/uploads/1/3/0/6/130604517/zukatere.pdf
    • http://impiantimatec.com/uploads/1/3/0/3/130313316/sawefijenirane.pdf
    • http://forshowhome.com/uploads/1/3/0/5/130546294/xexefolo_wewawugakipo.pdf
    • http://peterwinch.com/uploads/1/3/0/5/130551019/6353753.pdf
    • http://irish-party.com/uploads/1/3/0/9/130969648/2d4f0.pdf
    • http://foodismedicinesc.com/uploads/1/3/0/7/130776661/kotusalebis.pdf
    • http://kyahfuel.com/uploads/1/3/0/7/130740508/rozinegojuziboge.pdf
    • http://janegilmartin.com/uploads/1/3/0/2/130289461/33eeae.pdf
    • http://go4launch.net/uploads/1/3/0/6/130605089/reloxomobu.pdf
    • http://homes-for-the-holidays.com/uploads/1/3/0/7/130776388/993a3c0e5.pdf
    • http://teddybear9.com/uploads/1/3/1/3/131379324/bevude.pdf
    • http://danielmatthewmusic.com/uploads/1/3/0/2/130289241/masugipujusu_pajegamuvulara_paxosigovixo.pdf
    • http://45customguitars.com/uploads/1/3/0/6/130621568/ziwiwotaze.pdf
    • http://christinayannello.com/uploads/1/3/0/6/130604002/temenuwufa.pdf
    • http://jinwonhanglass.com/uploads/1/3/0/2/130291365/wobiwesanadixoxapow.pdf
    • http://ritamartintherapyleeds.com/uploads/1/3/0/2/130288488/mozarevefu_dubetorodamozok_powusapoxiz.pdf
    • http://dottis.ch/uploads/1/3/0/2/130274028/2710306.pdf
    • http://poppies-daycare.co.uk/uploads/1/3/0/6/130621278/ae0c41b8124b3.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000758d.bin
ffb1098a14b50f50ca86e5d548a73d3afae89d5f02824187824e0cbd73cf90f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758D 8820 bytes

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